Re: 2.4.23 hard lock, 100% reproducible.

[Chris Frey]

On Sat, Dec 06, 2003 at 08:34:32PM -0800, Mark Symonds wrote:
> Other than that, nothing.  Is there a patch out there 
> that will simply make 2.4.22 secure?  Things run great
> on that kernel. 

Here's the relevant section from patch-2.4.23

- Chris


diff -urN linux-2.4.22/mm/mmap.c linux-2.4.23/mm/mmap.c
--- linux-2.4.22/mm/mmap.c      2003-06-13 07:51:39.000000000 -0700
+++ linux-2.4.23/mm/mmap.c      2003-11-28 10:26:21.000000000 -0800
@@ -1041,6 +1041,9 @@
        if (!len)
                return addr;

+       if ((addr + len) > TASK_SIZE || (addr + len) < addr)
+               return -EINVAL;
+
        /*
         * mlock MCL_FUTURE?
         */

-
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